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 //
 // C++ Interface: cValue, cValueList
 //
 /*
 Copyright 2005-2011 Tomas Mecir <kmuddy@kmuddy.com>
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License as
 published by the Free Software Foundation; either version 2 of 
 the License, or (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #ifndef CVALUE_H
 #define CVALUE_H
 
 class cValueData;
 class KConfigGroup;
 class QXmlStreamWriter;
 
 #include <qstring.h>
 
 /**
 Class cValue holds one value, used in variables and in function evaluator.
 
 @author Tomas Mecir
 */
 class cValue {
  public:
   /** constructor */
   cValue ();
   cValue (const cValue &val);
   cValue (const QString &val);
   cValue (int val);
   cValue (double val);
   cValue (bool val);
 
   /** destructor */
   ~cValue ();
 
   static cValue *load (KConfigGroup *g);
   void save (QXmlStreamWriter *writer, const QString &name);
 
   /** assignment operator */
   cValue &operator= (const cValue &a);
 
   /** set value to nothing */
   void setValue ();
   /** set value to a string */
   void setValue (const QString &val);
   /** set value to an integer */
   void setValue (int val);
   /** set value to a number */
   void setValue (double val);
   /** set value to a copy of a given value */
   void setValue (const cValue &val);
   void setAsMarker ();
   /** set one particular item in an array */
   void setItem (int index, const QString &value);
   /** remove an item from an array */
   void removeItem (int index);
   /** add an item to the list */
   void addToList (const QString &item);
   /** remove an item from the list */
   void removeFromList (const QString &item);
   /** does the list contain a given string ? */
   bool listContains (const QString &item);
 
   QString asString () const;
   int asInteger () const;
   double asDouble () const;
   /** Return array item with the given index, if any. Arrays only. */
   QString item (int index) const;
   /** Does the list contain a given value ? Lists only.*/
   bool contains (const QString &item) const;
   /** Number of entries in a list/array. */
   int size () const;
  
   /** join a list into a string, using the given separator */
   QString listJoin (const QString &sep) const;
   /** convert a string to a list, using the given separator */
   cValue toList (const QString &sep) const;
 
   bool isEmpty() const;
   bool isString() const;
   bool isInteger() const;
   bool isDouble() const;
   bool isArray() const;
   bool isList() const;
   bool isMarker() const;
 
   /// some operators ...
   cValue operator[] (int index) const;
   
   static cValue empty () { return _empty; };
  protected:
 
   /** detach from current value, deleting it if no one else uses it */
   void detachValue ();
   /** ensure that no one else uses our value */
   void unique ();
     
   cValueData *d;
   
   static cValue _empty;
 };
 
 /// some external operators ...
 cValue operator+ (const cValue &a, const cValue &b);
 cValue operator- (const cValue &a, const cValue &b);
 cValue operator* (const cValue &a, const cValue &b);
 cValue operator/ (const cValue &a, const cValue &b);
 
 
 #endif